Underground cesspool.



lB. E. ELLIS L G. D. GREENE.

UNDERGROUND CESSPOOL. APPL|CAT|0N-FILED MAY l2 1915.

Patented Aug. 17, 1915 oo j Alfa/0602 i Parana4 onreine;

BENJAMIN F. ELLIS AND GEORGE D. GREENE, OF LOS ANGELES, CALIFORNIA.

UNDERGROUND CESSPOOL.

T0 all whom it may concern.' Y A Be it known that we, BENJAMIN F. ELLrsand GEORGE D. GREENE, citizens of the United States, residing at LosAngeles, in the county of Los Angeles and State of California, haveinvented knew and useful Improvements in Underground Cesspools, of whichthe following is aspecification.

Our invention relates to improvements in cess-pools in which a drainconnection` is provided for draining thewater therefrom into a drainbore from which the water percolates into the ground. n

A cess-pool as usually constructed consists of acistern-likeiunderground cavity built with wooden or brick walls, thelatter being arched over at the top, which is usually provided with aman-hole, and a cover therefor. The latter is usually about two feetbelow the level of the ground and is covered with cess-pool, said pumptaking out the liquidv contents of the cess-pool positioned'between Ythe layer of grease and the sediment At greater intervals of time it isnecessary to remove the sediment and the grease from the cess-pool.

It is an object of our invention to avoid the necessity of pumping outand hauling Voli the liquid contents as described by drilling or boringa hole leading to` approxi-- mately the middle of the cess-pool, saidbore extending from the cess-pool at an acute angle upwardly andcommunicating with a vertical drain bore. The drain bores are drilled ordug adjacent to the cess-pool and are made of a depth suficient to reacha bed of sand or gravel, which acts as a filter retaining all matterwhich might prove injurious to health if allowed to percolate and reacha source of water supply. When a layer of sand or gravel is notavailable it is necessary to constructthe drain bore of a greater depthand provide a great number of drainage fissures at the bottom thereof bytheexplosion of a small charge of dy- Specication of Letters Patent.

Y whereby Patented Aug. 1?, 1915.

Applicationled May 1i2, 1915. Serial No. 27,490.

namite. This construction provides means for draining off the clearwater automatically without allowing any sediment to pass through and,at the same time, retaining the grease from` passing into said drainbore, thus preventing the clogging up the sand filter or drainagefissures above referred to.

f The provision of a bore leading obliquely from-substantially themiddle of the cesspool to the drain bore is objectionable in thisrespect: The water flowing down one `side of the drain bore graduallyerodes the wall, causing the clay and other heavy earths to be washeddown 'into the bottom of said bore and clogging the drainage through thesand, gravel and other lighter soils, thereby necessitating the frequentcleaning out of the drain bore.

It is another object of our invention to provide novel and improvedmeans to overcome this diiculty and to )prevent the water liowing downthe walls thereof. This tion pipe provided with a goose neck downwardlyextending into the drain bore,

the water drained from the cesspool will fall straight down, having nocontact with the walls of the drain bore before it strikes the bottom. 1

Lerosion of the drain bore caused by the v.

The accompanying drawing forming a part of this specification shows avertical cross ysection of a cess-pool provided with our improved gooseneck drain connection.

10 represents the cess-pool constructed with brick walls`l2, thelatterforming an arch at the top provided with a man-hole 13 having a cover14.

We have shown two drain bores 16 located at opposite sides of thecess-pool though any number of drain bores may be provided as desired.These drain bores are constructed deep enough until they strike a layerof sand and gravel. If this is not possible because of the absence ofsand and gravel layers in the locality where the cess-pool is located, asmall charge of dynamite is eirploded at the bottom of these drain bores1n order to produce the necessary' drainage fissures. Both'the layer ofsand and gravel wardly into the drain bore. An inlet opening 19 locatednear the top ofthe cess-pool admits the sewage and waste water thereto.

From the foregoing description the operation of our improved cess-poolwill be easily understood. The cess-pool is gradually filled with sewageand waste water through inlet 19. The bacteria which are present willcause said cess-poo1 to function as a septic tank causing the separationof the matter carried in suspension by the liquid in the cess-pool. Suchseptic action will separate the liquid into three distinct layers, thelowest a sediment of the more solid particles and a top layer ofcomparatively slight thickness of grease and oil, and an intermediatelayer of comparatively clear water. The water constitutes by far thegreater portion of the contents of the cess-pool. The inclined drainconnection pipe 17 will drain this water into the drain bore whence itwill percolate through the soil and sand. The contracted goose neckconnection at the outer end of the drain connection pipe extendingdownwardly into the drain bore will cause the water to iow straight downwithout coming into contact with the walls of the drain bore, therebyeffectively preventing the erosion thereof and a consequent filling upof the lower part of the drain bores. By providing an in.- clined drainconnection pipe the water only will be drained off but the layer ofgrease will be retained in the cess-pool because of said inclination ofthe drain connection pipe, as willbe understood, no grease being able toenter said drain connection pipe nor flow over into the drain bores andcause clogging and stoppage of the natural drainage through the lighterearths and soils.

It is therefore seen that we have provided a simple and elicient meansfor automatically draining the water from a cess-pool yet retaining, onthe one hand, the sediment and, on the other, the grease containedtherein, and at the same time preventing the erosion of the walls of thedrain bores, thereby maintaining the functioning of the cess-pooluntilsuch time when the layer of sediment and layer of grease make theirremoval from the cess-pool necessary.

'into the drain bore and out of contact of ythe walls of said drainbore, whereby the water from the cess-pool is drained into said drainbore yet the erosion of the walls of said drain bore is prevented,substantially as described.

2. A cess-pool provided with a man-hole,

an inlet to said cess-pool located near the top thereof, a verticaldrain bore adjacent to said cess-pool, and a drain connection pipeestablishing communication between said cess-pool and said drain bore,said drain connection pipe leading from substantially the middle'of thecess-pool at an acute angle upwardly into said drain bore and beingprovided at its upper end with a goose neck extending downwardly intothe drain bore and out of contact of the walls of said drain bore,whereby the water from the cess-pool is drained into said drain bore yetthe erosion of the walls of said drain bore is prevented, substantiallyas described.

3. A cess-pool provided with a man-hole, an inlet to said cess-poollocated near the top thereof, a vertical drain bore adjacent to saidcess-pool, and a drain connection `pipe establishing communication,between said cess-pool and said drain bore, said drain connection pipeleading from substantially the middle of the cess-pool at an acute angleupwardly into said drain bore, Whereby the water from the cess-pool isdrained into said drain bore, substantially as described.

In `witness that We claim the foregoingl we have hereunto` subscribedour names this 5th day of May, 1915. 1

- BENJAMIN F. ELLIS.

GEO. D. GREENE.

